作为附带项目，CentOS还建立了其发行版的用户更新包，但这些库默认情况下不启用，因为他们可能破坏兼容性。

As a side project, CentOS also builds updated packages for the users of its distributions, but the repositories containing them are not enabled by default as they may break upstream compatibility.

youdao

我知道这两个额外的符号十分讨厌；我也知道这将会破坏向后兼容性。

I know the extra two characters are annoying; I know this will break backwards compatibility.

youdao

这种类型的API的任何变化都有可能破坏向后的兼容性，引起大量问题。

Any change to an API of that kind will break backwards compatibility and cause a lot of trouble.

youdao